Losing weight in its simplest definition involves reducing the number of fat cells in the body.
There are a number of ways to achieve this. For example, the subcutaneous adipose tissue can be captured by negative air pressure and damaged by local cooling. Another way is to generate steam bubbles in the adipose tissue using the energy of high-frequency electromagnetic waves. Eventually, the fat cells will swell and break down.
The broken fat cells will release cell sap and fat particles, which will be metabolized by the liver.